The horizontal directional drilling process is both simple and highly effective in principle and operation. A pilot hole is drilled between the access and exit points along a specified route using a steerable drill stem. Once the bore is completed, the drill cord is utilised to pull a service pipe or cable through the newly formed hole. This phase of the operation can also include reaming of the hole to increase the bore diameter right back as far as the start point, should it be necessary.
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